diff --git a/Dockerfile b/Dockerfile
index 14d45ac..88a6d68 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,5 @@
 FROM mitmproxy/mitmproxy:latest
-RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/*
 EXPOSE 8888 8081
 HEALTHCHECK --interval=10s --timeout=5s --retries=10 --start-period=30s \
-  CMD curl -sf -o /dev/null -w "%{http_code}" http://localhost:8081/ | grep -qE "200|403" || exit 1
+  CMD nc -z localhost 8081 || exit 1
 ENTRYPOINT ["mitmweb", "--web-host", "0.0.0.0", "--web-port", "8081", "-p", "8888", "--ssl-insecure", "--set", "web_open_browser=false", "--set", "web_password=mitm"]